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(No Model.) 2 SheetsSheet 2.

W. H. BENNETT. TENONING MAGHINE.

I No. 474,515. Patented May 10, 1892.

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' UNITED STATES PATENT OFFICE.

WILLIAM H. BENNETT, OF CHICAGO, ILLINOIS, ASSIGNOR TO OORNELIA E.

BENNETT AND ALMIN F. BARTLETT.

TENONING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 474,515, dated May 10, 1892.

Application filedOctober 24, 1890. Renewed February 8, 1892- Serial No, 420,783. (No model.)

T0 at whom it may concern:

Be it known that I, WILLIAM H. BENNETT, a citizenof the United States, residing at (Jhicago,in the county of Cook and Stateof Illinois, have invented a new and useful Improvement in Tenoning-Machines, of which the following is a specification.

My invention relates more particularly stated to an improvement in the clamp portion forming an attachment of a tenoning-machine and employed tohold firmly on the horizontallymovable platform or carriage the timber while the cutting mechanism is forming a tenon thereon.

My object is to provide a clamping attachment for a tenoning-machine which shall possess the quality of being readily and accurately adjustable to any size of tenoning-machine.

My further object is to provide a generallyimproved construction of tenoning-machine clamp.

In the accompanying drawings, Figure 1 is a perspective view of a known form of tenoning-machine provided with my improved clamping attachment; Fig. 2, a view in ele- 'vation, partly sectional and enlarged, of my improved clamp represented as in operation;

Fig. 3, a similar view of the clamp, showing the side thereof opposite that presented in Fig. 2; Fig. a, a plan View of the same partly in section and showing parts of the machine to which the clamp is applied as broken; and Fig; 5, a section taken on the line 5 of Fig. 3 andviewed in the direction of the arrow.

A denotes a tenoning-machine which, with the exception of the clamp, involves no features of my invention, being well known and illustrated merely to render the more readily comprehensible the construction and manner of application of my improved clamping attachment 0. Hence description of the details of the machine is not herein necessary. The clamp 0 comprises, generally stated, a lever fulcrumed on a suitable support to permit it to be turned to or about to a perpen dicular position with relation to the work, and carrying in its bearing end an anti-friction roller.

Following is a description of my improved clamp in all its details, as illustrated, and

which are believedto produce the bestconstruction for the clamp.

D is a lever fulcrumed at m (thus between its ends) on a bearing-bar 7", having at each end and at right angles to it a bearing-bar q, provided at its upper and lower ends with perforated lugs 13, one of which is extended laterally or lengthwise of the bar 4" to form a stop 19' for the lever D, against its being turned farther than required or desirable beyond a position perpendicular to the bar 1'. Rods o extend through the lugs 19 on the respective barsq and beyond the opposite ends of the latter, being elastically supported by springs n, confined around them between stops n on their upper ends and the upper lugs 19. To the lower ends of the rods 0 Isecure a bearing-plate E, which should taper on its upper side toward one end, as shown, thus to render it wedge-shaped, and to the base of which may be fastened a corresponding plate m, of rubber, leather, or the like, to afford a yielding lower bearing-surface on the plate E. On the lower or bearing end of the lever D is journaled a roller D to bear against the plate E, being journaled at one end in the lever and at its opposite end in a bracket 25, extending laterally from a face of the lever, and having one edge beveled, as shown at c, Fig. 3, to afford a stop to prevent the lever from dropping in releasing the plate E from its bearing effect below a position in which it is handy to the operator.

The support for the clamping-tool proper, thus described, may involve any suitable construction; but I prefer so to form it that the clamping-tool may by means thereof be readily and accurately adjusted for its operation to different positions transversely of the carriage or bed B of the touching-machine, and to different elevations with relation to the bed-surface, and that the support shall be readily adjustable to fit carriages B of different widths. Accordingly I provide the lonnuti.

tudinally and provided with stiffening-flanges standards and through the bar G at its reby that portion of my device which is directly cesses g, and fastened with thumb-nuts h. The clamping-tool proper is supported on the bar G by bolts f, passed through the slots s in the bar from the bearing-bar 0", one of which screws f forms the fulcrum for the lever D.

The clamp O is fastened, as shown in Fig. 1, on the inner end of the carriage B (which is movable on the ways to) by inserting the threaded stems 1' of the standards F through holes suitably provided in the carriage-bed and securing them by the nuts 2". The work or timber T to be tenoned is adjusted on the carriage B, against the gage e, and held by the clamp byturning the lever D to'or somewhat beyond-a perpendicular position far enough to be impeded by the stop 19, and so turning the lever causes its roller D to bear against the plate E to force and hold it firmly against the work, the wedge shape of the upper surface of the plate E tending to increase the pressure of the lever as its roller is moved up the incline of the surface. When the work T is-to be released, the lever D is turned to release the plate E, (being obstructed against turning farther than necessary by the stop '0 striking the under side of the bar G,) and the plate E, being thus released from the work, is raised by the resilient action of the springs 12, thusautomatically following the roller D as it rises.

G may not only be raised and lowered on the standards F, as already described, but the clamping-tool proper may be moved farther:

toward one side or the other of the work on loosening the nuts of the screws fand sliding the tool to the desired positions on the crossbar.

The clamping-tool proper (meaning theresupported on the bar 1*) may be otherwise supported and adjustable than by means of the slotted bar G, and the standards F need not involve the exact construction shown and de- 1 scribed for supporting the bar G and rendering it adjustable.

to details without thereby departing from my invention, the essential features of the tool being the lever D, fulcrumed on a support to be turned to or toward a perpendicular posi- Hence I do not limit my improvement to the details of construction set 1 tion with relation to the work T, and carrying an anti-friction bearing-roller D.

What I claim as new, and desire to secure by Letters Patent, is

1. In combination with the carriage of a tenoning-machine, a clamp comprisinga support secured to the said carriage, and a clamping-tool secured to the support and formed with an elastically-supported plate E to bear down upon and hold the work against the carriage and beveled on its upper side toward one end, anda lever D, fulcrumed to the support over the bearing-plate and carrying at its lower end an anti-friction roller D and adapted to be turned toward aperpendicular position with its roller against the upper side of the bearing-plate to force and wedge the plate down upon the work, substantially as described.

2. In a clamp for a tenoning-machine, the combination of asupport to be secured to the carriage of the machine, and a clamping-tool adjustably secured to the support and comprising a bar 0", having end bearing-bars q, supporting reciprocating rods 0, sustained by springs n and carrying a bearing-plate E,-and a lever D, fulcrumed on the bar 1" and carrving at its bearing end an anti-friction roller D, substantially as described.

3. In a clamp for a tenoning-machine, the

combination of a support to be secured to the carriage of the machine and comprising standards, and a cross-bar adj ustably connectedtoward its opposite ends with the standards, and a clamping-tool secured to the cross-bar, the cross-bar being rigid in its adj ustedposition and the clamp being movable to operate it on the cross-bar, substantially as described.

4. In a clamp for a tenoning-machine, the combination of a support to be secured to the carriage of the machine and comprising standards F, and a cross-bar G, adjustably connected toward its opposite ends with the stand- To adjust the clamp to the work T, the bar ards, and a clamping-tool secured to the crossbar and having a lever D, carrying an antifriction roller D at its bearing end, and a reciprocating bearing-plate E, controlled by the lever, substantially as described.

5. In a clamp for a tenoning-mac'hine, the combination of a support to be securedto the carriage of the machine and comprising longitudinally-slotted standards F, tudinally-slotted cross-bar G, adjustably connected at its opposite ends with the standards, and a clamping-tool comprising a bar r, adj ustably connected with the cross-bar G and having end bearing-bars q, supporting reciprocating rods 0, sustained by springs 0t and carrying a bearing-plate E, and a lever D, carrying at its bearing end an anti-friction roller D, substantially as and forthe purpose set forth.

A clamp O fora tenoning-machine,comprising, 1n combination, slotted standards F, to be secured to the carriage of the machine, a slotted cross-bar G, recessed near its oppoand a longisite ends to admit the standards and adjust- D at its bearing end, the whole being eonably secured thereto, and a clamping-tool strueted and arranged to operate substaneomprising a bar 0', adj ustabiy supported at tially as described.

the slot of the bar G and having end bearing- WILLIAM H. BENNETT. bars q, supporting-rods 0, sustained by springs In presence ofn, a"beveied plate E, secured to the rods 0, CHAS. E. GAYLORD,

and a lever D, carrying an anti-friction roller M. J. FROST. 

